Woodland which has been in continuous existence since 1600 (1750 in Scotland).

Annual ring

The sleeve of wood put on each growing season over the previous year's wood and under the bark on both stern and branches. Consists of
spring wood and summer wood, the latter usually darker and thereby showing up as a ring in cross section.

Arboretum

A collection of specimen trees.

Arboriculture

Management of individual trees or groups of trees primarily for their amenity value.

Assortment (Stand)

The breakdown of a stand of timber into different products. Estimated using stand assortment tables, and based on the average
dbh of the stand and the minimum top diameter required for the products being considered.